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Forensic DNA

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https://www.readbyqxmd.com/read/28441635/validation-of-smartrank-a-likelihood-ratio-software-for-searching-national-dna-databases-with-complex-dna-profiles
#1
Corina C G Benschop, Linda van de Merwe, Jeroen de Jong, Vanessa Vanvooren, Morgane Kempenaers, C P Kees van der Beek, Filippo Barni, Eusebio López Reyes, Léa Moulin, Laurent Pene, Hinda Haned, Titia Sijen
Searching a national DNA database with complex and incomplete profiles usually yields very large numbers of possible matches that can present many candidate suspects to be further investigated by the forensic scientist and/or police. Current practice in most forensic laboratories consists of ordering these 'hits' based on the number of matching alleles with the searched profile. Thus, candidate profiles that share the same number of matching alleles are not differentiated and due to the lack of other ranking criteria for the candidate list it may be difficult to discern a true match from the false positives or notice that all candidates are in fact false positives...
April 15, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28441096/judicial-decision-making-and-juvenile-offenders-effects-of-medical-evidence-and-victim-age
#2
John Michael Falligant, Rebecca L Fix, Apryl A Alexander
A growing body of evidence suggests that jurors place greater weight on DNA or other types of forensic evidence than non-forensic evidence (Cole & Dioso-Villa, 2009). For cases involving child sexual abuse, certain types of evidence, including forensic medical evidence, may be viewed as more important or indicative of abuse than other types of evidence, such as victim statements or disclosure. The present study evaluated perceptions of juvenile offenders and victim credibility across four vignettes that systematically manipulated variables related to victim age and physical indicators of abuse...
April 25, 2017: Journal of Child Sexual Abuse
https://www.readbyqxmd.com/read/28439786/a-panel-of-130-autosomal-single-nucleotide-polymorphisms-for-ancestry-assignment-in-five-asian-populations-and-in-caucasians
#3
Hsiao-Lin Hwa, Chih-Peng Lin, Tsun-Ying Huang, Po-Hsiu Kuo, Wei-Hsin Hsieh, Chun-Yen Lin, Hsiang-I Yin, Li-Hui Tseng, James Chun-I Lee
Ancestry informative single-nucleotide polymorphism (AISNP) panels for differentiating between East and Southeast Asian populations are scarce. This study aimed to identify AISNPs for ancestry assignment of five East and Southeast Asian populations, and Caucasians. We analyzed 145 autosomal SNPs of the 627 DNA samples from individuals of six populations (234 Taiwanese Han, 91 Filipinos, 79 Indonesians, 60 Thais, 71 Vietnamese, and 92 Caucasians) using arrays. The multiple logistic regression model and a multi-tier approach were used for ancestry classification...
April 24, 2017: Forensic Science, Medicine, and Pathology
https://www.readbyqxmd.com/read/28439695/usefulness-of-telomere-length-in-dna-from-human-teeth-for-age-estimation
#4
Ana Belén Márquez-Ruiz, Lucas González-Herrera, Aurora Valenzuela
Age estimation is widely used to identify individuals in forensic medicine. However, the accuracy of the most commonly used procedures is markedly reduced in adulthood, and these methods cannot be applied in practice when morphological information is limited. Molecular methods for age estimation have been extensively developed in the last few years. The fact that telomeres shorten at each round of cell division has led to the hypothesis that telomere length can be used as a tool to predict age. The present study thus aimed to assess the correlation between telomere length measured in dental DNA and age, and the effect of sex and tooth type on telomere length; a further aim was to propose a statistical regression model to estimate the biological age based on telomere length...
April 24, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28433078/haplotype-counting-for-sensitive-chimerism-testing-potential-for-early-leukemia-relapse-detection
#5
Marija Debeljak, Evelina Mocci, Max C Morrison, Aparna Pallavajjalla, Katie Beierl, Marie Amiel, Michaël Noë, Laura D Wood, Ming-Tseh Lin, Christopher D Gocke, Alison P Klein, Ephraim J Fuchs, Richard J Jones, James R Eshleman
Fields of forensics, transplantation, and paternity rely on human identity testing. Currently, this is accomplished through amplification of microsatellites followed by capillary electrophoresis. An alternative and theoretically better approach uses multiple single-nucleotide polymorphisms located within a small region of DNA, a method we initially developed using HLA-A and called haplotype counting. Herein, we validated seven additional polymorphic loci, sequenced a total of 45 individuals from three of the 1000 Genomes populations (15 from each), and determined the number of haplotypes, heterozygosity, and polymorphic information content for each locus...
May 2017: Journal of Molecular Diagnostics: JMD
https://www.readbyqxmd.com/read/28432993/chemical-biological-and-dna-markers-for-tracing-slaughterhouse-effluent
#6
P J Harvey, M P Taylor, H K Handley, S Foster, M R Gillings, A J Asher
Agricultural practices, if not managed correctly, can have a negative impact on receiving environments via waste disposal and discharge. In this study, a chicken slaughter facility on the rural outskirts of Sydney, Australia, has been identified as a possible source of persistent effluent discharge into a peri-urban catchment. Questions surrounding the facility's environmental management practices go back more than four decades. Despite there having never been a definitive determination of the facility's impact on local stream water quality, the New South Wales Environment Protection Authority (NSW EPA) has implemented numerous pollution reduction requirements to manage noise and water pollution at the slaughter facility...
April 19, 2017: Environmental Research
https://www.readbyqxmd.com/read/28430826/geographic-origin-and-individual-assignment-of-shorea-platyclados-dipterocarpaceae-for-forensic-identification
#7
Chin Hong Ng, Soon Leong Lee, Lee Hong Tnah, Kevin Kit Siong Ng, Chai Ting Lee, Bibian Diway, Eyen Khoo
The development of timber tracking methods based on genetic markers can provide scientific evidence to verify the origin of timber products and fulfill the growing requirement for sustainable forestry practices. In this study, the origin of an important Dark Red Meranti wood, Shorea platyclados, was studied by using the combination of seven chloroplast DNA and 15 short tandem repeats (STRs) markers. A total of 27 natural populations of S. platyclados were sampled throughout Malaysia to establish population level and individual level identification databases...
2017: PloS One
https://www.readbyqxmd.com/read/28427331/erratum-to-more-comprehensive-forensic-genetic-marker-analyses-for-accurate-human-remains-identification-using-massively-parallel-dna-sequencing
#8
Angie D Ambers, Jennifer D Churchill, Jonathan L King, Monika Stoljarova, Harrell Gill-King, Mourad Assidi, Muhammad Abu-Elmagd, Abdelbaset Buhmeida, Mohammed Al-Qahtani, Bruce Budowle
No abstract text is available yet for this article.
April 20, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28419902/evaluating-the-efficacy-of-dna-differential-extraction-methods-for-sexual-assault-evidence
#9
Sonja B Klein, Martin R Buoncristiani
Analysis of sexual assault evidence, often a mixture of spermatozoa and victim epithelial cells, represents a significant portion of a forensic DNA laboratory's case load. Successful genotyping of sperm DNA from these mixed cell samples, particularly with low amounts of sperm, depends on maximizing sperm DNA recovery and minimizing non-sperm DNA carryover. For evaluating the efficacy of the differential extraction, we present a method which uses a Separation Potential Ratio (SPRED) to consider both sperm DNA recovery and non-sperm DNA removal as variables for determining separation efficiency...
March 31, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28419283/dna-based-identification-of-forensically-important-blow-flies-diptera-calliphoridae-from-india
#10
Meenakshi Bharti, Baneshwar Singh
Correct species identification is the first and the most important criteria in entomological evidence-based postmortem interval (PMI) estimation. Although morphological keys are available for species identification of adult blow flies, keys for immature stages are either lacking or are incomplete. In this study, cytochrome oxidase subunit 1 (COI) reference data were developed from nine species (belonging to three subfamilies, namely, Calliphorinae, Luciliinae, and Chrysomyinae) of blow flies from India. Seven of the nine species included in this study were found suitable for DNA-based identification using COI gene, because they showed nonoverlapping intra- (0...
April 17, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28417259/comparison-between-magnetic-bead-and-qpcr-library-normalisation-methods-for-forensic-mps-genotyping
#11
Bhavik Mehta, Samantha Venables, Paul Roffey
Massively parallel sequencing (MPS) is fast approaching operational use in forensic science, with the capability to analyse hundreds of DNA identity and DNA intelligence markers in multiple samples simultaneously. The ForenSeq™ DNA Signature Kit on MiSeq FGx™ (Illumina) workflow can provide profiles for autosomal short tandem repeats (STRs), X chromosome and Y chromosome STRs, identity single nucleotide polymorphisms (SNPs), biogeographical ancestry SNPs and phenotype (eye and hair colour) SNPs from a sample...
April 18, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28401661/chemical-discrimination-of-lubricant-marketing-types-using-dart-tofms
#12
Mark Maric, Lauren Harvey, Maren Tomcsak, Angelique Solano, Candice Bridge
RATIONALE: In comparison to other violent crimes, sexual assaults suffer from very low prosecution and conviction rates especially in the absence of DNA evidence. As a result, the forensic community needs to utilize other forms of trace contact evidence, like lubricant evidence, in order to provide a link between the victim and the assailant. METHODS: In this study, 90 personal bottled and condom lubricants from the three main marketing types, silicone-based, water-based and condoms, were characterized by direct analysis in real time-time of flight mass spectrometry (DART-TOFMS)...
April 12, 2017: Rapid Communications in Mass Spectrometry: RCM
https://www.readbyqxmd.com/read/28401303/evaluation-of-forensic-genetic-parameters-of-12-str-loci-in-the-korean-population-using-the-investigator-%C3%A2-hdplex-kit
#13
Ju Yeon Jung, Eun Hye Kim, Yu-Li Oh, Hyun-Chul Park, Jung Ho Hwang, Si-Keun Lim
We genotyped and calculated the forensic parameters of 10 non-CODIS loci and 2 CODIS loci of 990 Korean individuals using the Investigator(Ⓡ) HDplex kit. No significant deviations from Hardy-Weinberg equilibrium (after Bonferroni correction for multiple testing) or genetic linkage disequilibrium were observed. The calculated matching probability and power of discrimination ranged from 0.0080 to 0.2014, and 0.7986 to 0.9920, respectively. We conclude that the markers of the kit are highly informative corroborative tools for forensic DNA analysis...
April 11, 2017: International Journal of Legal Medicine
https://www.readbyqxmd.com/read/28399228/species-abundance-and-identification-of-forensically-important-flies-of-saudi-arabia-by-dna-barcoding
#14
Ashraf Mashaly, Reem Alajmi, Abd El-Zaher Mustafa, Ahmed Rady, Hussein Alkhedir
Because they may demonstrate characteristics of the environment where a body has been laying prior to the discovery, flies are insects of forensic interest. We investigated the fly abundance and the effect of location in Kingdom of Saudi Arabia on fly species diversity that attack decomposing human and animal remains. Using baited traps deployed in each location, we collected 3,697 flies of seven species belonging to three families. Chrysomya albiceps Wiedmann represented 60.86% of the collected flies, whereas Musca domestica L...
March 30, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28397234/-analysis-of-genetic-polymorphisms-and-mutations-of-20-frequently-used-str-loci-among-ethnic-hans-from-henan
#15
Hongdan Wang, Bing Kang, Yue Gao, Xiaodong Huo, Tao Li, Qiannan Guo, Bofeng Zhu, Shixiu Liao
OBJECTIVE: To study the genetic polymorphisms and mutations of 20 frequently used autosomal microsatellites among ethnic Hans from Henan. METHODS: Peripheral blood samples of 2604 individuals were collected. DNA was amplified and genotyped using a PowerPlex(TM) 21 system. The frequencies, forensic parameters and mutation rates of the 20 short tandem repeat (STR) loci were analyzed. RESULTS: A total of 323 alleles were found in this population and the allelic frequencies have ranged from 0...
April 10, 2017: Zhonghua Yi Xue Yi Chuan Xue za Zhi, Zhonghua Yixue Yichuanxue Zazhi, Chinese Journal of Medical Genetics
https://www.readbyqxmd.com/read/28391756/problems-in-mitochondrial-dna-forensics-while-interpreting-length-heteroplasmy-conundrum-of-various-sindhi-and-baluchi-ethnic-groups-of-pakistan
#16
Shahzad Bhatti, Muhammad Aslam Khan, Sana Abbas, Marcella Attimonelli, Gerardo Rodriguez Gonzalez, Hikmet Hakan Aydin, Erica Martinha Silva de Souza
The insight heterodox genetics of mtDNA infer new perspectives at the level of human mitochondrial control region heteroplasmy, which is substantial in evolutionary as well as forensic interpretation. The main goal of this study is to interrogate the recurrence and resolve the ambiguity of blurry spectrum of heteroplasmy in the human mtDNA control region of 50 Baluchi and 116 Sindhi unrelated individuals. Sanger sequencing was employed classically, that was further investigated by minisequencing. Only 20% Baluchi and 25...
April 9, 2017: Mitochondrial DNA. Part A. DNA Mapping, Sequencing, and Analysis
https://www.readbyqxmd.com/read/28391141/development-and-validation-of-a-novel-multiplexed-dna-analysis-system-innotyper-%C3%A2-21
#17
Hiromi Brown, Robyn Thompson, Gina Murphy, Dixie Peters, Bobby La Rue, Jonathan King, Anne H Montgomery, Marion Carroll, James Baus, Sid Sinha, Frank R Wendt, Bing Song, Ranajit Chakraborty, Bruce Budowle, Sudhir K Sinha
We report here a novel multiplexed DNA analysis system consisting of 20 Alu markers and Amelogenin for analysis of highly degraded forensic biological samples. The key to the success of the system in obtaining results from degraded samples is the primer design yielding small amplicon size (60-125bp) for all 20 markers. The markers included in the InnoTyper(®) 21 system are bi-allelic, having two possible allelic states (insertion or null) and thus termed INNULs. The markers are short interspersed nuclear elements (SINEs), a category of retrotransposable elements (REs) which are non-coding genomic DNA repeat sequences, or "mobile insertion elements," comprising approximately 40% of the human genome...
March 18, 2017: Forensic Science International. Genetics
https://www.readbyqxmd.com/read/28391112/validating-sonication-as-a-dna-extraction-method-for-use-with-carrion-flies
#18
Trevor Stamper, E Scott Wong, Alicia Timm, Ronald W DeBry
Entomological evidence can be critical in establishing a postmortem interval estimate. DNA-based species identification can be an extremely valuable tool for forensic entomology. The problem of processing samples in a consistent, cost-effective manner that retains the morphological attributes of the specimen for vouchering has led us to investigate sonication as a primary means of non-destructive DNA extraction from carrion flies. We analyze the efficacy of this technique and compare it to an established DNA extraction technique - the Qiagen DNeasy tissue kit...
March 20, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28387876/development-of-a-polymorphic-short-tandem-repeat-locus-multiplex-system-for-efficient-human-identification
#19
R G Rodovalho, E L Rodrigues, G S Santos, L M Cavalcanti, P R Lima, A G Rodovalho, R G Vital, M A D Gigonzac, A D da Cruz
This study aimed to develop a short tandem repeat (STR) multiplex system, made up of 22 highly informative STR loci, for application in forensic genetics. The system comprised 21 polymorphic autosomal loci (D3S1358, TH01, D21S11, D18S51, Penta E, D5S818, D13S317, D7S820, D16S539, CSF1PO, Penta D, vWA, D8S1179, TPOX, FGA, D2S441, D17S1301, D19S433, D18S853, D20S482, and D14S1434) and the amelogenin gene locus. Strategies were developed to overcome the challenges involved in creating a multiplex system. Based on the literature and available databases, the STR loci were selected with the aim to obtain discriminatory markers, and followed specific criteria for this purpose...
April 5, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28384982/amelogenin-gene-the-pioneer-in-gender-determination-from-forensic-dental-samples
#20
Priyanjali Dutta, Satish Bhosale, Rajeshwar Singh, Priyanka Gubrellay, Jitendra Patil, Bhumika Sehdev, Sachin Bhagat, Tajinder Bansal
INTRODUCTION: In the event of any mass fatality incident, DNA analysis plays a vital role in disaster victim identification. Teeth are one of the most resistant structures in the human body that resist decomposition hence making them prime choice for extracting DNA for identification of individuals. Polymerase Chain Reaction (PCR) analysis that target regions of Amelogenin gene have become the method of choice for sex determination of biological samples. AIM: Determining the sex of a given DNA sample from either dental pulp or dentin of tooth and help in identification of missing persons and disaster victims...
February 2017: Journal of Clinical and Diagnostic Research: JCDR
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